I don't "bleed' during intercourse on a normal basis but rather bled the last time I had sex. This is the first time this has ever happened. Without TMI I was in an odd position with something pressing into my lower back pretty hard, I'm not sure if this could have anything to do with it. I'm on birth control pills & I have been sick (just a cold). I am supposed to start my period on the 17th (so 5 days from now). If it happens again I will go to the doctor but since this is the first time its ever happened I thought I would see if anyone knew common reasons for this to sporadically occur.

Bleeding during or after sex is not considered normal and therefore should be evaluated at all times. The only time bleeding during or after sex is considered normal in some cases is if you are having sexual intercourse for the first time.

Some causes of vaginal bleeding after sex, such as vaginal dryness after menopause or in some cases by the use of certain types of birth control pills are not serious and may be easily treated.

However, in some cases, vaginal bleeding after sex can be a sign of a serious underlying problem, including:

* Inflammation of the cervix (cervicitis).

* Sexually transmitted diseases, such as chlamydia or gonorrhea.

* Cervical polyps.

* Cervical ectropion, a condition in which the cervical tissue is more susceptible to abrasion.

* Endometriosis or ovarian cysts.

* Pelvic inflammatory disease.

* Uterine fibroids.

* Cancer of the cervix, uterus or vagina.

If you continue to experience bleeding during or after sex, I would recommend that you consult with your doctor/gynaecologist to see what they think could be causing this.